This sheet cake frosting is rich, creamy, and perfect for any type of cake. It's smooth, fluffy, and extremely spreadable.
1 cup unsalted butter, room temperature
8 ounces cream cheese
4 cups powdered sugar
1/4 teaspoon salt
1 vanilla bean, halved lengthwise, or 1 teaspoon vanilla extract vanilla bean or vanilla extract
1/8 teaspoon salt